Remove duplicate items from an array [duplicate]

Answer 1

You'd be much better off filtering out the duplicates in the SQL query. add a constraint which fetches a UNIQUE recipientID

Answer 2

Please check below code, I hope this is help full for you.

$resultArray = uniqueAssocArray($actualArray, 'RecipientID');

function uniqueAssocArray($array, $uniqueKey) {
if (!is_array($array)) {
    return array();
}
$uniqueKeys = array();
foreach ($array as $key => $item) {
    $groupBy=$item[$uniqueKey];
    if (isset( $uniqueKeys[$groupBy]))
    {
        //compare $item with $uniqueKeys[$groupBy] and decide if you 
        //want to use the new item
        $replace= false; 
    }
    else
    {
        $replace=true;
    }
    if ($replace) $uniqueKeys[$groupBy] = $item;   
}
return $uniqueKeys;

}

Answer 3

The array_unique function will do this for you. You just needed to add the SORT_REGULAR flag:

$items_thread = array_unique($items_thread, SORT_REGULAR);

However, as bren suggests, you should do this in SQL if possible.